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Configuring and Importing Sample Projects

Scenario

HDFS provides sample projects for multiple scenarios to help you quickly learn HDFS projects.

The procedure for importing HDFS example codes is described as follows: Figure 1 shows the procedure.

Figure 1 Sample project importing procedure

Procedure

  1. Obtain the sample project folder hdfs-example-security in the src directory where the sample code is decompressed. For details, see Obtaining Sample Projects from Huawei Mirrors.
  2. Copy the user.keytab and krb5.conf files obtained in Preparing the Developer Account section to the conf directory of the sample project.
  3. Import the example project to the IntelliJ IDEA development environment.

    1. Open IntelliJ IDEA and choose File > Open.
    2. Choose the directory of the example project hdfs-example-security. Click OK.

  4. Add the related jar files the example project depending on into classpath.

    If the sample project code is obtained from Huawei Mirrors, the related JAR packages will be automatically downloaded after Maven is configured. You do not need to manually add the JAR packages.

  5. Add the conf directory in the project to the resource path. On the menu bar of the Intellij IDEA, choose File > Project Structure. In the dialog box that is displayed, click Modules, select the current project and click Resources > conf > OK to set the resource directory. Figure 2 shows the directory for setting the project resource.

    Figure 2 Setting the Project Resource Directory

  6. (Optional) When running SmallFS example code, you need import the dependent xml files for the example project.

    Copy smallfs-site.xml from the folder where the downloaded client is decompressed SmallFS\config to the conf folder in the hdfs-example-security project.
    Figure 3 Importing smallfs-site.xml

  7. Set the IntelliJ IDEA text file coding format to prevent garbled characters.

    1. On the IntelliJ IDEA menu bar, choose File > Settings.
    2. Choose Editor > File Encodings from the navigation tree of the Settings window. In the "Global Encoding" and "Project Encodings" area, set the value to UTF-8, click Apply, and click OK, as shown in Figure 4
      Figure 4 Setting the IntelliJ IDEA coding format

Parent topic: Environment Preparation